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vco ghz
i want a single output.
using differential structure is not difficult but after that LC network is needed to combine the differential outputs which decreases the output power because of the poor Q.
That is the reason for using sinlge-ended VCO.
Thanks
designing of single ended vco
hi all,
I find few papers about VCO design using single transistor for the frequency at several GHz. Is anyone know the reason? for colpitts structure, is it suitable for 3-10 GHz design?
many thanks!
Re: Help: How to do noise analysis in ADS for a ring Oscilla
you can google it (HB simulation) and get a pdf file from agilent website.
the file is too large to be uploaded here.
microstrip balun design
Hi all,
I need to design a balun and I read the tutorial from
www.odyseus.nildram.co.uk/RFMicrowave_Circuits_Files/Balun%20Design.pdf
On the last page, an improved microstrip version (Figure 10) is given but no explaination.
Can anyone tell me why the value of L1 is...
Thanks biff44,
Actually I am learning the RFIC design course, and doing a small design project. I just wondering if the output voltage swing can be higher based on the cmos analog circuit.
I am sorry that I have no idea what the advantage of HIGH VOLTAGE SWING is, for a certain ouput power...
Hi manish12,
As I know, push-pull output swing is from 0~VDD, if differential structure is used, output swing can reach -VDD~VDD. But can not meet the requirement. What does "switch mode supply" mean? Is it the same with charge pump? Thank you for futher explaination.
power amplifier 2vdd
hi all,
I want to have an output voltage -2VDD to +2VDD, where VDD is the power supply. The load impedance is 50 ohms. Can I use a source follower torealize it? I simulated but failed. Also for a power amplifier, the output swing usually from -VDD to +VDD. Is there any...
Hi all,
I am using ADS HB simulating a VCO. It can work, but there are many warnings:
Warning detected by HPEESOFSIM during DC analysis `Osc1'
While evaluating `dcSourceLevel':
ln() changed return type during a simulation. Not supported..
Warning detected by HPEESOFSIM during HB...
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